voku / portable-utf8

    static $UTF8_TO_WIN1252_KEYS_CACHE = null;

    static $UTF8_TO_WIN1252_VALUES_CACHE = null;

    if ($UTF8_TO_WIN1252_KEYS_CACHE === null) {

      if (self::$WIN1252_TO_UTF8 === null) {

        self::$WIN1252_TO_UTF8 = self::getData('win1252_to_utf8');

      }

      $UTF8_TO_WIN1252_KEYS_CACHE = \array_keys(self::$WIN1252_TO_UTF8);

      $UTF8_TO_WIN1252_VALUES_CACHE = \array_values(self::$WIN1252_TO_UTF8);

    }

    /** @noinspection PhpInternalEntityUsedInspection */

    $str = \str_replace($UTF8_TO_WIN1252_KEYS_CACHE, $UTF8_TO_WIN1252_VALUES_CACHE, $str);

    static $WIN1252_TO_UTF8_KEYS_CACHE = null;

    static $WIN1252_TO_UTF8_VALUES_CACHE = null;

    if ($WIN1252_TO_UTF8_KEYS_CACHE === null) {

      if (self::$WIN1252_TO_UTF8 === null) {

        self::$WIN1252_TO_UTF8 = self::getData('win1252_to_utf8');

      }

      $WIN1252_TO_UTF8_KEYS_CACHE = \array_keys(self::$WIN1252_TO_UTF8);

      $WIN1252_TO_UTF8_VALUES_CACHE = \array_values(self::$WIN1252_TO_UTF8);

    }

    return \str_replace($WIN1252_TO_UTF8_KEYS_CACHE, $WIN1252_TO_UTF8_VALUES_CACHE, $str);

  }